//1. 引入 react
import React from 'react';
import {BrowserRouter}  from  'react-router-dom';
//单纯的让 rem.js 运行一下
import './utils/rem';
//2. 引入 react-dom
import ReactDOM from 'react-dom';

//3. 引入 App 组件
import App from './App.js';

//4. 渲染
ReactDOM.render(<BrowserRouter><App /></BrowserRouter>, document.querySelector('#root'));